Pipe-threading machine.



s; M. STOUGHK: H 0. LABIGJLJ PIPE THBBADING MACHINE. v 4 APPLICATION FILED SEPT. 16, 1909.

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s. M. STOUGH & H'. 0. LARIGK.

PIPE THRBADING MAOHINB. APPLICATION FILED SEPT.15, 1909. 9 4, 15, Patented Feb. 21, 1911.

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' (lime/1341 right or left hand threads SAMUEL 1V1. STOUGI-I AND HARRY LARICK, F FRANKFORT, INDIANA.

PIPE-THREADING MACHINE.

Specification of Letters Patent.

Patented Feb. 21, 1911.

Application filed September 15, 1909. Serial No. 517,854.

To all whom it may concern:

Be it known that we, SAMUEL M. STOUGH and HARRY C. LARIOK, citizens of the United States, residing at Frankfort, in the county of Clinton and State of Indiana, have invented certain new and useful Improvements in Pipe-Threading Machines, of which the following is a specification.

This invention relates to new and useful improvements in pipe threading machines and has for its primary object to provide a machine of this character whereby either may be cut with equal facility and despatch.

Another object is to provide a machine which is simply constructed and may be very quickly converted into a right or left hand thread cutter.

A further object is to provide a machine of this character wherein new and novel means is provided for rotating the die head.

A still further object is to provide improved means for simultaneously adjusting the radially disposed dies.

lVith these and other objects in view, the present invention consists in the combination and arrangement of parts as will be hereinafter more fully described and particularly pointed out in the appended claims, it being understood that changes in the specific structure shown and described may be made within the scope of the claims without departing from the spirit of the invention.

In the drawings forming a part of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure l is. a side view partly in longitudinal section showing the same assembled for the cutting of right hand threads. Fig. 2 is an end view, the die head cap being removed. Fig. 3 is a section taken on the line 33 of Fig. 1. Fig. 4 is a similar view taken on the line 44 of Fig. 1. Fig. 5 is a section taken on the line 55 of Fig. 1. Fig. 6 is a detail side elevation of the reversing sleeve.- Fig. 7 is a detail view of one of the dies and the adjusting screw therefor. Fig. 8 is a detail perspective view of the ratchet plunger rod. Fig. 9 is a detail fragmentary view of the die head cap.

Referring to the drawings, 5 indicates the tubular body member having a reduced inset extension 5 at its inner end providing the shoulder 5 This member is also provided with a plurality of longitudinal slots 6 opening at its outer end to receive-slidably the radial arms 7 of the spider or die head 8. The spider 8 has integrally formed therewith the inwardly extending exteriorly threaded sleeve 9, and an annulus 10 is integrally formed with the radial bars 7 at their outer ends, and slidably encircling the member 5. The sleeve 9 is provided with right hand threads which are adapted to engage with similar threads provided upon the inner periphery of the reversing sleeve 12. This sleeve is formed with the circular flange 13 at its upper end, and a leaf spring 14 is secured to the under side of this flange. The spring 14 has secured to the free end thereof a pin 15 which is slidably projected through the flange and normally positioned in an orifice 16 formed in the die head to lock the reversing sleeve to the die head during the cutting of a left hand thread. The outer surface of the sleeve 12 is pro-vided with left hand threads which engage with the similarly threaded inner surface of the retaining sleeve or bushing 17. This bush-. ing is likewise formed with a flange 18 at one end seated normally against the shoulder 5 a portion of it being cut away to receive the leaf spring 14 when the members 12 and 17 are threaded snugly upon each other and the flanges 13 and 18 are disposed in close engagement with each other.

The exterior surface of the retaining sleeve at its inner end is provided with right hand threads which are adapted to engage with the threads formed upon the interior of a locking sleeve 19, the outer end of which is restricted and extended as at 20 and provided with set screws 21 threaded therethrough and adapted to have binding engagement upon the pipe or other work being operated upon. A leaf spring 22 is secured at one end to the exterior of the bushing 19, and carries a pin 23 at its free end which extends through' an opening formed in the bushing and engages in a notch 24 in the edge of the sleeve 17. The pin 23 is also adapted to extend into an opening 25 provided in the lower end of the reversing sleeve 12. When in this position the sleeves 12 and 17 will be securely locked against relative rotative movement. A screw 26 is disposed in the bushing 19 and engages in an opening 27 provided in the sleeve 17, thus locking the bushing 19 and sleeve 17 in either operation of the machine.

The body member 5 is formed with a flange 28 extending in spaced relation to the inset portion 5' and integrally formed therewith. A channel 29 is thus formed, the shoulder 5 comprising its bottom, and adapted to receive the annular toothed portion 30 of an operating member 31. Interiorly threaded radial sleeves 32 are integrally formed with the operating member 31 and are adapted to receive the handles 33 by means of which the die head may be rotated.

In order to obviate the necessity of completely rotating the operating member 31 when desirable, I have formed the body portion 5 with a tubular extension 34 in which is disposed the longitudinally movable ratchet engaging bolt 35. This bolt is normally held in engagement with the ratchet teeth by means of the spiral spring 36 which is positioned upon a suitably reduced portion of the bolt and bears against an interior shoulder 37 formed in the extension 34. It will be noted that the inner end of the bolt is beveled upon one side and upon its opposite side is formed with a square notch or recess 38, thereby permitting of the rotation of the operating member 31 in but one direction. When it is desired to change the machine from a right hand thread cutter to a left hand cutter, it is only necessary to retract the bolt 35 and give the same a half turn which will reverse the previous disposal of the beveled inner end of the bolt, so that the direction of rotation of the operating member will be changed from right to left or vice versa.

It will be noted that the bushing 19 is provided with the interior beveled portion 19, formed at the junction of its major and restricted portions, which is adapted to provide a seat for the beveled extremity 12 of the reversing sleeve 12. This beveled end 12 will permit of the quick engagement of the left hand threads which are formed upon the exterior of the SlGBXQ 12 and the interior of the sleeve 17 It also serves the function of deflecting the pin 23 which projects into its path allowing the pin to snap into the opening 25 automatically.

An exteriorly threaded flange 40 is integrally formed with the die head and is provided with the longitudinal slots 41 beside which guide walls'42 extend and between which the dies 43 are positioned. The radial arms 7 are disposed in alinement with the slots 41 thus formed and the dies are movably mounted thereon. These dies are simultaneously adjustable to provide for the accurate cutting of the threads upon pipes of various diameters and to effect this result I provide the adjusting screws 44, which are formed with a head 45 upon their inner ends. These heads are received in the under cut slots 46 formed across the ends of the dies, the reduced portion of the screws bemg engaged in the contracted portion 47 of the slots 46. The screws 44 loosely project through the openings 48 in the annulus 10 of the die head and have threaded engagement in the draw blocks or anchors 39 l positioned between the annulus 10 and the guide walls 42. The portions of the screws 44 extending beyond the die head are notprovided with threads, but are angular in cross section and receive slidably the gears 49 which have angular apertures therethrough and engage the teeth of a rack 50 formed upon the under surface of the circular adjusting member 51 carried revolubly upon the annulus 10. The adjusting member 51 is formed with the circumscribing flange 52 which is disposed beyond the outer faces of the gears which are confined between this flange and the periphery of the annulus against radial movement. The member 51 is provided with a handle 53 by means of which it may be turned to rotate the gears 49 and the adjusting screws 44. It will be obvious that when such rotative movement is imparted to the adjusting screws, the dies 43 will be moved inward or outward in ac cordance with the direction of movement of the member 51, by reason of the threaded engagement of the screws 44 in the blocks 43. Thus the positioning of the dies with relation to the periphery of the pipe may be simultaneously accomplished and with uniformity. After the dies have been positioned in the die head as above set forth, a cap plate 54 having the threaded flange 55 is threaded upon the flange 40 of the die head or spider. The plate 54 is provided with a short slot 56, which when the plate has been screwed down upon the die head will be positioned directly above the orifice reversing member 12. A set screw 57 extends through the slot 56, and is adapted to descend through the orifice l6 andforce the pin 15 therefrom when screwed home, thus disconnecting the reversing member 12 from the die head to permit of the rotation of the die head within the reversing member for the cutting of right hand threads.

Bracket plates 58 are secured to the periphery of the die head and slidably embrace the adjusting member 51. One of these plates is provided with a spring pressed pin 59 which is adapted to engage in an opening (30 formed in the periphery of the adjusting member, and securely holds said member against any accidental rotative movement, so that thedies will not be moved from the positions to which they have been adjusted.

lVhen the various parts have been assembled, a strengthening ring 61 is threaded upon the end of the body 5, and eifectually prevents any spreading of the section plates which are formed by the provision of the longitudinal slots 6.

The machine is operated in the following 16 which receives the pin 15 carried by the manner. When it is desired to cut a right hand thread the pin 28 is disposed in the notch 2 1 and the opening 25 in the sleeves 17 and 12 respectively thus preventing the rotation of the reversing sleeve within the retaining member. The screw 57 is then screwed home and the machine turned to the left, which will move the die head to the upper end of the slots 6 formed in the body member. The pipe to be threaded is now placed in position by insertion through the lock sleeve 19 with its extremity abutting the die members and the thumb screws 21 are threaded inwardly into binding and supporting engagement with the periphery of the pipe. The dies 13 are then to be properly adjusted radially to engage the periphery of the pipe and the operating member 33 rotated to the right. The die head is thus rotated and moved downwardly, a right hand thread being out upon the pipe. When the die head has reached the extent of its longitudinal movement, (the inner ends of the slots 6), the movement thereof is reversed until it is again positioned at the upper end of the body member. The pipe may now be removed, or projected farther through the machine and again secured in position by the thumb screws, when the thread cutting operation may be continued in the manner above set forth. To change the machine so that a left hand thread may be cut, the die head is run down to the inner ends of the slots 6, and the screw 57 is removed from the orifice 16, to allow the pin 15 which extends through the flange of the reversing member, to enter the orifice thus locking the die head and the reversing member so that they will be rotated in unison upon the operation of the machine. Before it is possible to operate the machine atall after the reversing member and the die head have been thus connected, it is necessary to remove the pin 23 from engagement in the openin 25 formed in the lower end of the sleeve 12. The retaining member 17 will be held from rotation by means of the screw 26. The operating member is now turned to the right and the die head caused to travel to the outer end of the body member again, and the pipe to be threaded is placed in position in the machine as before. The machine is now turned to the left, and as the die head and the reversing sleeve are locked, and the retaining member is rigidly secured in the bushing 19, which in turn is fastened to the pipe; the reversing sleeve 12 upon the exterior of which a left hand thread is provided will move downwardly in the retaining sleeve 17, and carry the die head with it until the bars 7 are positioned in the lower end of the slots 6. Thus a left hand thread may be cut with equal facility and as much accuracy as a right hand thread by the use of the same dies and without requiring the disassembling of the various machine parts.

From the foregoing it will be seen that we have provided a thread cutting machine which is of comparatively simple construction, and may be very quickly operated for the cutting of either right or left hand threads.

By providing the operating member with the ratchet portion and the spring actuated bolt engaging therewith, it is obvious that the great amount of manual labor now reqnired in machines of this character when operating on large pipes is largely dispensed with, as the operating iandles may be oscillated to suit the convenience of the user and the best leverage thus obtained.

The various parts of our improved threading machine may be readily formed at a minimum expense and no especially designed machinery is required for their construction. The adjustment of the dies may be instantly accomplished, thus adapting the machine for use in connection with pipes of various diameters, without the necessity of removing any of the machine elements, whereby considerable time may be saved. It will be understood that the disposition of the movable dies in the die head may be altered as desired or a greater or less number employed than is shown in the drawings.

The machine may be quickly disassembled when the dies become worn and it is necessary to replace them with new ones, or for the purpose of cleaning the machinery. The dies can be readily removed and others employed when it is desired to change the pitch of the threads.

hat is claimed is:

1. The combination with a stationary pipe engaging member, of a longitudinally slotted revoluble sleeve carried by the stationary member, a spider longitudinally reciprocable in the sleeve and having a plurality of radial arms projected through the slots of the sleeve, said body having a central pipe receiving passage therethrough, and provided with gnideways on each of its arms. dic members reciprocable in said guideways and adapted to project into said pipe receiving passage at times, said dies having transverse grooves in their end faces, the sides of said grooves being undercut, a centrally perforated and threaded anchor portion at the extremities of the arms, a screw member threaded in the anchor device, said screw having a head portion disposed in said undercut groove of the die member for reciprocation of the die upon rotation of the screw, said screw members having their outer portions reduced and of angular shape in cross section, angularly perforate gears slidably engaged over said outer portions of the screws, an annular gear commonly meshed with said gears and revoluble around said sleeve, means for rotating the annular gear for radial adjustment of the dies, and means for securing said annular gear against movement at times.

2. In a device of the class described, the combination with a stationary pipe gripping device, of a sleeve revoluble thereon, said sleeve having a plurality of longitudinally extending slots opening on one end, a spider member revoluble longitudinally thereof, and including a central body portion having a pipe receiving opening therethrough and a plurality of radially extending arms projected respectively through the slot in the sleeve and slidable therein, an integral annular member carried at the end of said arm and slidable over the sleeve, said body member having a plurality of slots extended longitudinally from one end thereof in registry with the respective arms, guideways formed in the arms and opening through the slots, said body member being circular and threaded adjacent the outer portions of said slots, die members slidable in the guideways of the arms, a retaining member threaded upon said body member and abutting against the die members to hold them loosely in the guideways, said die members having screw members swiveled thereto, anchor members carried at the outer ends of said arms inwardly of said sleeves, and having threaded perforations therethrough receiving the screws, said screws having their outer portions reduced and angularly formed, said annulus having openings therethrough receiving the reduced portions of the screws revolubly and slidably, angularly perforate gear members slidable upon the screws, an annular gear revoluble without said sleeve and meshed commonly with said gears upon the dies, said annular gear having a flange thereon adapted to' retain the first named gears against radial movement, means to hold said annular gear in engagement with the first named gears, means for rotating the annular gear, and means for holding said annular gear against rotation at times.

3. I11 a device of the class described, the combination with a stationary pipe engaging member, of a revoluble sleeve member thereon, said sleeve having a plurality of longitudinally extending slots opening on one end thereof, a spider member slidable therein, said spider member comprising a body portion including an annular exteriorly threaded portion, a plurality of longitudinally extending slots opening from its threaded end, a plurality of radial arms having side portions therein registering with respective slots, and opening thereinto, said arms being approximately U-shaped in cross section, a plurality of die members slidable in the guideways, a retaining member threaded upon the annular portionfor retention of the dies in the guideways, and means for reciprocating the diesradially for engagement with pipes of various sizes.

4. In a device of the class described, the combination with a stationary portion and a revoluble sleeve thereon having a plurality of longitudinally extending slots, a spider member reciprocable therein and having arms projected through respective slots, guide portions upon the arms stoppingshort of the inner surface of the sleeve, die members reciprocable in the guideways, anchor members having screw members revolubly threaded therein and swiveled in the outer ends of the dies, said anchor members comprising a central rectangular boss portion projected into the respective slots of the sleeve and having laterally projecting portions adapted to engage slidably against the inner surface of the sleeve, said anchor members being adapted to receive the thrust of the screws outwardly when said dies are engaged operatively, and means for rotating said screws.

5. In a device of the class described, the combination with a longitudinally slottedsleeve, a carrier slidable therein having radial guide portions, die members slidable in the guide portions, anchor blocks having threaded perforations therethrough registering with the guide portions, said anchor members having portions set slidably in respective slots in the sleeve and having laterally extending portions adapted to engage against the inner. surface of the sleeve on opposite sides of the slots to resist the thrust of the die members, screw members threaded through the anchor members and swiveled to the die members, and means for rotating the screw members.

6. In a device of the class described, a car rier having a plurality of radial guideways, die members slidable therein, anchor portions having threaded openings therethrough at the outer ends of the guideways, screw members threaded through said openings and swiveled in the die members, gears slidable upon the screws and revoluble therwith, an annular rack gear meshed with the first named gears and revoluble with respect thereto, means for retaining said annular gear revolubly in operative position, means for retaining said annular gear against operation at times, and a suitable reversing member. y

In testimony whereof we aflix our signa tures, in presence of two Witnesses.

SAMUEL M. STOUGH. HARRY G. LARICK.

-Witnesses SAMUEL M. HUNSIOKER, RILEY M. SHEPHERD. 

